| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 24368 |
98.2%
|
| 2 | 7 years old or younger | 125 |
0.5%
|
| 3 | 8 or 9 years old | 78 |
0.3%
|
| 4 | 10 or 11 years old | 51 |
0.2%
|
| 5 | 12 or 13 years old | 65 |
0.3%
|
| 6 | 14 or 15 years old | 87 |
0.4%
|
| 7 | 16 years old or older | 30 |
0.1%
|
| Sysmiss | 703 |